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Application filed by Л.М. Коков, Д.Н. Кузмин, А.А. ШестаковfiledCriticalЛ.М. Коков
Priority to SU49364ApriorityCriticalpatent/SU18709A1/ru
Application grantedgrantedCritical
Publication of SU18709A1publicationCriticalpatent/SU18709A1/ru